ok guys this is really bugging me. any help would be greatly appreciated.

p-3500

a-4000

r-.0525

quarterly rate.so n=4

so the question is asking for the number of years. so t is my unknown variable.

i set it up like this.

4000= 3500 (1+.O525/4)^4t

so far so good ryt?

4000=3545.9375 ^4t

using the property of log that can be written as

log 4000= 4t log 3545.9375

so ill get

log 4000/log 3545.9375=4t

1.01473=4t

.2536=t

my question is how come im not getting 2.5 something years. i need to multiply it by ten to get the real answer?

is it because the base of log is 10 or am i doing something wrong.

thanks

im working on a 2nd problem

this one im totally off

a=10,000 p=5000 r=.09 n=2

10000=5000(1+.09/2)^2t

10000=5225^2t

log10000=2t log 5225

log10000/log5225=2t

.5379=t

the answer should be

7.9

thanks in advance guys